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Method for a delay in screen saver activation using a keyboard IR input

Publishing Venue

Abstract

Disclosed is a method for a delay in screen saver activation using a keyboard infrared (IR) input. Benefits include improved functionality and improved end-user satisfaction.

Country

United States

Language

English (United States)

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This is the abbreviated version, containing approximately
50% of the total text.

Method for a delay in screen saver activation using a
keyboard IR input

Disclosed is a method for a delay in screen saver activation
using a keyboard infrared (IR) input.
Benefits include improved functionality and improved end-user satisfaction.

General description

The disclosed method describes an
addition to a PC keyboard consisting of an IR sensor placed on the front of a
keyboard to detect close-range movement. The IR sensor is connected to the
microcontroller, which determines if the person is near the keyboard, and
periodically sends a signal to the PC. The screen saver is not activated until
the person leaves the PC. This method greatly reduces user annoyance due to
unexpected screen saver activation because the keyboard is not touched for a few
minutes.

The disclosed method is completely
contained in the keyboard, requiring no addition/modification to the PC or to
the PC operating system or software.

Advantages

The disclosed method reduces user
annoyance when a screen saver activates because input has not been received for
some time. No change to the PC or software is required.

Detailed description

The disclosed method is comprised of
two basic hardware blocks: the IR sensor circuitry, and rest of the circuitry,
which is digital and includes the keyboard microcontroller.

The basic circuitry consists of a
fresnel lens, through which the IR rays are transmitted onto a pyroelectric
sensor (see Figure 1). The sensor is sensitive to radiation over a wide range
so a filter window can be added to limit incoming radiation to the 8 to 14 mm
range, which is most sensitive to human body radiation. Typically, the
field-effect...